Convert multiple dates in one cell into multiple months in another

[artichokejoe]

If I have one date in a single cell, then I would use the formula 

DATETIME_FORMAT({}, 'MMMM) to convert that date into a month. 

However, sometimes when using a Look Up I'm pulling multiple dates, separated by commas, into one cell. I'd like to find a formula that will convert all of these multiple dates into the month equivalent. So solving the 'error below'.

 

Any help much appreciated. Thanks. 

[Sho · Accepted solution]

It's simple.
Add the "DATETIME_FORMAT({}, 'MMMM)" formula field to the Lookup source table.
Then, Lookup it.
If you make it a Rollup field instead of a Lookup field and use ARRAYUNIQUE(), only unique values will be displayed.

[artichokejoe]

Fantastic. That's worked. Thank you.